Face facts: in a swimming race against 14-time Olympic gold medalist swimmer Michael Phelps, you'd have no chance whatsoever...but you may be able to beat him in speed putting! If you can make more than 12 five-foot putts in a minute, you'll have bragging rights forever:

This is "The Best of Us Challenge," presented by the International Olympic Committee, where Olympic athletes challenge the YouTube community to compete in some truly unique events. For example, you can challenge American Olympic gold medalist gymnast Shawn Johnson by tapping-your-ears-while-doing-a-handstand. (FYI: she did it 54 times in 30 seconds.) Or take on one of the world's fastest men, Jamaican sprinter Asafa Powell, who balanced a stick on his foot for two minutes and 30 seconds. Six-time Grand Slam winner and Olympic gold medalist Rafael Nadal picked up 24 tennis balls in 30 seconds (making great use of his groin area) — how many can you get?

If you've got the moxie to best these world class athletes, check out the The Best of Us Challenge channel on YouTube to learn how to submit your video. Prizes include a trip for two to the Vancouver Winter Olympic Games in February 2010 and a trip for two to the Youth Olympic Games in Singapore in August 2010, as well as T-shirts, video games and posters. Submissions end on Sunday, November 15, so whatever your skill is — putting, hand-standing, hula-hooping, etc. — get out there and show the world your best.